Patent US4019880A successfully refreshed from Google Patents.
US4019880A
Expired / Lapsed
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Adsorption of carbon monoxide using silver zeolites
Assignee: Katalistiks International Inc
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Filing: 1976-08-10
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Granted: 1977-04-26
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Expires: 1996-08-10
Abstract
Abstract Zeolitic molecular sieves having high SiO 2 /Al 2 O 3 molar ratios and containing Ag + cations are found to exhibit a high degree of selectivity and affinity for CO molecules and are capable of separating CO from gas streams even when water vapor is present.
Inventors
- 👤 Jule Anthony Rabo
- 👤 James Nelson Francis
- 👤 Charles Leslie Angell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:24
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; C; C01; C01B; C01B32/00; C01B32/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
Process for removing carbon monoxide from a gas stream comprising at least 10 ppm CO by volume and at least one other constituent selected from the group consisting of H 2 O and CO 2 which comprises passing said gas stream at a temperature of from 0 to 300° C. through an adsorbent mass of a crystalline zeolitic molecular sieve having a framework SiO 2 /Al 2 O 3 molar ratio of from 20 to 200 and having as zeolitic constituents silver cations, whereby CO molecules are adsorbed and a CO-depleted effluent gas stream is obtained.
Claim 2
Dependent Claim
96 words
Process for removing carbon monoxide from a gas stream comprising at least 10 ppm CO by volume and at least one other constituent selected from the group consisting of H 2 O and CO 2 which comprises passing said gas stream at a temperature of from 0 to 300° C. through an adsorbent mass of a crystalline zeolitic molecular sieve having a framework SiO 2 /Al 2 O 3 molar ratio of from 20 to 200 and having as zeolitic constituents silver cations, whereby CO molecules are adsorbed and a CO-depleted effluent gas stream is obtained.
Claim 3
Dependent Claim
21 words
Process according to claim 1 wherein the framework SiO 2 /Al 2 O 3 molar ratio is from 20 to 100.
Claim 4
Dependent Claim
24 words
Process according to claim 2 wherein the gas stream is passed through the adsorbent mass at a temperature of 0° C. to 200° C.
Claim 5
Dependent Claim
19 words
Process according to claim 3 wherein the gas stream is air containing at least 10 ppm CO by volume.
References Cited (Backward Citations)
US3789106A
Cited
US3849340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |